In Premiere Pro CS6, my HD m2t and avo files play just OK, but after a few hours, the video gets noticibly more jerky. The jerkiness comes and goes as if on a timer. OK for 30 seconds, jerky for 30 seconds and on and on. Why does this happen after a few hours?
Dell Vostro 470, Windows 7, Intel Core i5-3450 CPU @ 3.10 GHz, 8 GB RAM, 64 bit OS, Geforce GT-620.
Do you have CPUID HWMonitor (or something else) to check your CPU and GPU temp levels?
Yes, they were all around 36 degrees C.